weatherbycounty

Grimes County Climate

JanFebMarAprMayJunJulAugSepOctNovDec69.2°AVG °F

Avg Annual Temp

69.2°F

Annual Precip

42.6"

Annual Snowfall

0.0"

Extreme Heat Days

Monthly Temperature

54.4°F avgJFMAMJJASOND

Precipitation Calendar

Dry
Wet= snowfall
3.8"
2.7"
3.2"
3.8"
4.5"
3.7"
2.4"
2.8"
3.3"
4.4"
3.5"
4.5"
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Growing Season & Gardening

USDA Hardiness Zone

9a

Minimum winter temperature range for plant survival

Seasonal Overview

Comfort ZoneSpring62°76°11.5"Summer82°85°8.9"Fall61°80°11.3"Winter52°55°11.0"20°40°60°80°100°

National Comparison

Warmer than 96% of US counties
Wetter than 52% of US counties
More seasonal variation than 10% of US counties

7-Day Outlook

Forecast

Current Conditions

Air Quality

Safety

Weather Alerts

Climate Advisory: Grimes County

Climate Verdict

Climate data for Grimes County is currently being compiled from NOAA sources. Check back soon for detailed weather normals.

Seasonal Breakdown

Seasonal weather data for this county is based on regional climate patterns. Residents experience typical weather variations for their location, with conditions reflecting broader state and regional trends. Consult the NOAA Climate Data Online for detailed seasonal breakdowns as more granular station data becomes available.

Outdoor & Gardening Guidance

Growing season and gardening guidance for Grimes County will be added as data becomes available.

Regional Context

Comparative climate data for Grimes County is being processed.

Climate Profile

About Grimes County Weather

A rainy corner of the Texas coastal plains

Grimes County receives 42.6 inches of rain annually, which is well above the national average for precipitation. While specific annual temperature data is limited, the region follows a generally warm coastal-inland pattern.

Higher rainfall than the Texas average

The county receives 42.6 inches of precipitation per year, far exceeding the Texas state average of 31.9 inches. This additional moisture defines the local landscape and agricultural capacity compared to drier central counties.

A transition zone between heat and moisture

Grimes stays wetter than its neighbors to the west, contributing to a greener environment year-round. While temperature data is restricted, the zero-inch snowfall average aligns with its warm-weather neighbors in the Brazos Valley.

Mild winters and heavy annual rainfall

Winter is virtually snow-free with a 0.0-inch annual average, though seasonal temperature specifics are currently unavailable. The primary seasonal feature is the distributed 42.6 inches of rain that keeps the region hydrated.

Drainage and moisture control are priorities

With over 42 inches of rain annually, homeowners should prioritize gutter maintenance and proper property drainage. Outdoor planning should account for wet ground conditions even during the milder winter months.

Frequently Asked Questions

What is the average temperature in Grimes County?
The average annual temperature in Grimes County, TX is 69.2°F, based on NOAA 30-year climate normals (1991-2020).
How much rain does Grimes County get?
Grimes County receives an average of 42.6 inches of precipitation per year, including both rain and meltwater from snow. This is based on NOAA 30-year climate normals.
Does it snow in Grimes County?
Grimes County receives little to no measurable snowfall in a typical year, based on NOAA 30-year climate normals.
How hot does Grimes County get in summer?
The average summer temperature (June-August) in Grimes County is 83.9°F.
How cold are winters in Grimes County?
The average winter temperature (December-February) in Grimes County is 53.4°F. January, typically the coldest month, averages 51.7°F.

Track your own weather in Grimes County

Ambient Weather personal weather stations give you hyperlocal climate data.

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Data sources: ERA5 Reanalysis (modeled) via Open-Meteo (gap-filled where station data unavailable).. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.

Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.

By Evan Brooks, Data EditorUpdated Reviewed by Evan Brooks, Data Editor
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